diff --git a/src/rendering/swrenderer/line/r_line.cpp b/src/rendering/swrenderer/line/r_line.cpp
index eaa2a80b04..e2e08b268d 100644
--- a/src/rendering/swrenderer/line/r_line.cpp
+++ b/src/rendering/swrenderer/line/r_line.cpp
@@ -314,8 +314,6 @@ namespace swrenderer
 
 		if (markportal)
 		{
-			draw_segment->drawsegclip.SetTopClip(Thread, start, stop, Thread->OpaquePass->ceilingclip);
-			draw_segment->drawsegclip.SetBottomClip(Thread, start, stop, Thread->OpaquePass->floorclip);
 			draw_segment->drawsegclip.silhouette = SIL_BOTH;
 		}
 		else if (!mBackSector)
diff --git a/src/rendering/swrenderer/segments/r_portalsegment.cpp b/src/rendering/swrenderer/segments/r_portalsegment.cpp
index d8aff120a0..6f69c7869f 100644
--- a/src/rendering/swrenderer/segments/r_portalsegment.cpp
+++ b/src/rendering/swrenderer/segments/r_portalsegment.cpp
@@ -55,18 +55,6 @@ namespace swrenderer
 		memcpy(ceilingclip, topclip + x1, len * sizeof(short));
 		memcpy(floorclip, bottomclip + x1, len * sizeof(short));
 
-		for (int i = 0; i < x2 - x1; i++)
-		{
-			if (ceilingclip[i] < 0)
-				ceilingclip[i] = 0;
-			if (ceilingclip[i] >= viewheight)
-				ceilingclip[i] = viewheight - 1;
-			if (floorclip[i] < 0)
-				floorclip[i] = 0;
-			if (floorclip[i] >= viewheight)
-				floorclip[i] = viewheight - 1;
-		}
-
 		mirror = linedef->special == Line_Mirror;
 	}
 }